如何比较两个自由空间？

Question

I have a text file where I put Space Required, that value (in kB) I extracted with :

string SpaceRequired = lines.Where(txt => txt.Contains("SpaceRequired"))
                            .Select(txt => txt.Split('=')[1].Replace("\"", ""))
                            .FirstOrDefault();

and the freeSpace that I need to compare it's here :

var drive = new DriveInfo("c");
long freeSpaceInC = drive.TotalFreeSpace;

private static string toReadableSize(long size)
{
    if (size < 1024 * 1024)
        return Math.Round(((float)size / 1024), 2) + "KB";

    if (size < 1024 * 1024 * 1024)
        return Math.Round(((float)size / (1024 * 1024)), 2) + "MB";

    return Math.Round(((float)size / (1024 * 1024 * 1024)), 2) + "GB";
}

This comparison I tried to do here :

private void Next_Click(object sender, EventArgs e)
{
    if (textBox1.Text.StartsWith("C:"))
    {
        /*if (freeSpaceInC >= SpaceRequired)
        {
            this.Visible = false;
            Form2 fm = new Form2();
            fm.ShowDialog();
        }
        else
            MessageBox.Show("You don't have free space");*/
    }

but I don't know to do this. I need to compare the value in kB, because in text file I have in kB . How I can do this ?

Answer 1

You have to parse the string, then you have the kb as long . Since TotalFreeSpace returns the total amount of free space available on a drive in bytes you have to multiply it with 1000:

long reqKB = long.Parse(SpaceRequired);
long reqBytes = 1000 * reqKB;
if (freeSpaceInC >= reqBytes)
{
    // ..
}